build: fix eslint fails on jest.config.js

Author: konokenj

.eslintignore

@@ -2,3 +2,4 @@
 **/cdk.out/**
 *.js
 *.d.ts
+*.json

.eslintrc.json

@@ -1,8 +1,11 @@
 {
   "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended", "prettier"],
+  "env": {
+    "node": true
+  },
   "parser": "@typescript-eslint/parser",
   "parserOptions": {
-    "project": "./tsconfig.json"
+    "project": null
   },
   "plugins": ["@typescript-eslint"],
   "rules": {}